Jenna Dewan, Ashlee Simpson, Elsa Hosk, Shanina Shaik, and more it-girls have rocked Vitamin A’s swimwear and beachy accessories — and there’s a good reason why.Shop Vitamin A SwimNot only are the pieces fashion-forward, but they’re all made using plant-based and recycled materials. «When I started Vitamin A, there was no concept of sustainability in swimwear… I was told by fabric suppliers that there was no market for swimwear made from recycled fibers, so I decided to design the fabric myself,» she explains.Beyond using eco-friendly fabrics, the businesswoman wanted to create swimsuits for every beach body by allowing people to mix and match sizes — and colors — however they choose.«Part of my vision was to bring a modern sensibility to swim that simply didn't exist when Vitamin A launched in 2000.